Duncanson rhymes with:
atkinson, hakanson, hokanson, wilkinson, aaronson, ahmanson, antonson, aronson, atkinson, beilenson, bezanson, briancon, christensen, christiansen, christianson, cinnamonson, clemensen, dyansen, edmonson, evanson, gejdenson, goldenson, goranson, gulbransen, gulbranson, hakanson, hermansen, hermanson, herschensohn, hoganson, hokanson, jorgensen, kristensen, kristiansen, loewenson, melanson, nathanson, robinson, simonsen, simonson, simonsson, soerensen, sorenson, stamenson, stephenson, stevenson, thorstenson, wilkinson, wolfensohn